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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Analytical Science and Technology
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Journal DOI :
The Korean Society of Analytical Science
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Volume & Issues
Volume 13, Issue 6 - 00 2000
Volume 13, Issue 5 - 00 2000
Volume 13, Issue 4 - 00 2000
Volume 13, Issue 3 - 00 2000
Volume 13, Issue 2 - 00 2000
Volume 13, Issue 1 - 00 2000
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Determination of Rhodium by Differential Pulse Polarography
Kwon, Young-Soon ; Hong, Mi-Jeong ; Czae, Myung-Zoon ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 1~4
Determination of trace rhodium, based on catalytic reduction of protons by the adsorbed Rhformaldehyde complexes formed in formaldehyde-hydrochloric acid medium, was demonstrated. The condition for the measurements of Rh at trace levels was 0.004%(w/v) formaldehyde-0.75M hydrochloric acid. In this medium detection limit was
and the linear dynamic range was
Rh. There were no interferences from other platinum group metal ions even in the presence of a 500-fold excess.
Analysis of the clinker formed in circulating fluidized bed boiler
Kim, Kyeong-Sook ; Park, Hyun-Joo ; Lee, Tae-Won ; Jeong, Nyeon-Ho ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 5~11
During the commissioning period in Tonghae thermal power plant which is the largest circulating fluidized bed boiler in the nation, a considerable amount of clinker was formed at FBAC and seal pot. Various attempts, for example, concentration analysis, surface phenomena, thermal characterization, and crystal structure of ash, bed sand, limestone, clinker, and mixture of each gradients have been studied to identify the causes of clinker formed in circulating fluidized bed boiler. As the results, the characterization of black particles in which separated from the clinker is more similar to that of bed sand, on the other hand, white particles are more similar to ash. In addition, the sintering temperature of sand is over
and this temperature was decreased as limestone is added to bed material. The cause of clinker was proved that ash was sticked to molten or sintered sand or limestone in the area of high temperature in the circulating system.
Analysis of Light Elements by PIGE
Kim, Y.S. ; Choi, H.W. ; Kim, D.K. ; Woo, H.J. ; Kim, N.B. ; Park, K.S. ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 12~21
The PIGE (Proton Induced Gamma ray Emission) method was applied for the measurement of light elements Li ~ K. A test measurement has been performed for geological, biological, environmental and material samples by using a standard sample for each element. The measurement was performed for the two proton energies of 2.4 and 3.4 MeV, and 3.4 MeV was found to yield better result for multielemental analysis. The result shows a fair agreement within 15% for all elements with standard values. The detection limits of Li, B, F and Na are less than 100 ppm, while those of the other elements are from a few hundred ppm to a few percents.
Spectrophotometric Determination of Vanadium(IV) with 2-Hydroxybenzaldehyde-5-Nitro-pyridylhydrazone in the Presence of Sodium Dodecyl Sulfate
Park, Chan-Il ; Jung, Young-Chul ; Cha, Ki-Won ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 22~26
2-Hydroxybenzaldehyde-5-Nitro-pyridylhydrazone (2HB-5NPH) was synthesized and its application in the spectrophotometric determination of vanadium ion(IV) was studied in the presence of surfactant. The optimum conditions of pH, solvent effect, concentration of ligand and surfactant were evaluated. The procedure was applied to determination of vanadium (IV) in mixture sample and real sample with satisfactory results (recovery
97% ; relative standard deviation
3.0% in the concentration range of
; detection limit,
Simultaneous Separation Analysis of Some Metal Ions in Piperidinedothiocarbamate Chelates by Reversed-Phase Liquid Chromatography
Lee, Won ; Bahng, Seung-Hoon ; Kim, Mi-Kyoung ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 27~33
Simultaneous separation and analysis of Ni(II), Pd(II), Co(II), Cu(II) and Hg(II) in peperidinedithiocarbamate (PDTC) chelates were investigated by reversed phase liquid chromatography. The optimum conditions for the separation of PDTC metal chelates were examined with respect to the pH, extraction solvent, and mobile phase strength on Novapak
column using methanol/water mixture as mobile phase. All metal PDTC chelates were eluted in an acceptable range of capacity factor value (
). The linear calibration curves were obtained in the concentration range of
for five metal ions, and also good precision in the range of 1.96~3.41% RSD was obseved. Under the optimum conditions, trace metat ions in the composite water sample were successfully separated and determined with relative error of
Analysis of Half-life Time and Residual Concentration of Fungicide Iminoctadine Triacetate in Soils
Oh, Hae-Bum ; Kim, Il-Kwang ; Jeong, Seung-ll ; Lim, Bang-Hyun ; Han, Sung-Soo ; Choi, Yong-Hwa ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 34~40
The optimum conditions for the half-life time and residual analysis of the iminoactadine triacetate fungicide on soils were investigated by using the gas chromatography. Iminoctadine triacetate(IOTA) was extracted from soils with 2.0 M-NaOH/methanol and chloroform. The extracted IOTA was derivatized to pyrimidine hexafluroacetylacetone by the acetylation and analyzed with GC/ECD after elimination of moisture and impurities on the Sep-Pak column. From the standard addition experiments with 0.1 and 1.0 ppm, the average recoveries were ranged from 83.8 to 93.2 % and the detection limit was 0.005 ppm. The half-life time of iminoctadine triacetate in the silty clay was 30 days in the laboratory and 19.5 days in the field test whereas it was 27 days and 17.5 days for each in case of silty loam.
Determination of Optimum pH of Enzyme by Electrochemical Method
Yoon, Kil-Joong ; Lee, Beom-Gyu ; Kwon, Hyo-Shik ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 41~48
A biosensor for the determination of hydrogen peroxide was constructed by immobilizing of porcine small instestinal tissue in a plain carbon paste, and the effect of varying the
concentration and pH on the rate of catalytic reaction was evaluated. For the mathematical simplicity, no mediator was added. Electrochemical properties and the maximal rate could be derived from the quantitative analysis of the observed phenomena related to the electrode reaction. Also, pH dependence of the Michaelis constant enabled to calculate various thermodynamic parameters and subsequently to design a electrochemical method to determine the optimum pH of enzyme.
Preparation and characterization of immobilized 8-hydroxyquinoline for chromatographic application
Kim, Bum-Soo ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 49~54
The 8-hydroxyquinoline derivative of silica gel has been prepared through the 5 step reaction. We carried out infrared as well as nuclear magnetic resonance spectrometric characterization of products taken from each step of reaction. IR study of bare silica gel showed free and hydrogen bonded hydroxyl. From the 1st step reaction, we observed IR bands for N-H and C-H as well as NMR peaks for three methylene carbons in APTS group. From the 2nd step, we observed IR bands for carbonyl, nitro and aromatic carbon group with NMR peaks for aliphatic, aromatic and carbonyl carbons. The reduction of
group is confirmed by IR and NMR from 3rd step reaction. In the last step, the immobilization of 8-quinolinol is confirmed by disappearance of
IR peak observed in 4th step.
Studies on the Quantitative analysis and the Health Effect of VOCs in Environment - Analysis for THMs of tap water in six cities of Korea -
Kim, Mi-Kyoung ; Park, Yuon-Sin ; Chung, Yong ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 55~65
In this study, we collected the tap water that treated from water plant in Seoul, Incheon, Taejon, Kwangju, Taeku and Pusan and supplied each house. The sampling period was June and September, 1997. The concentration of THMs formed by chlorination in drinking water was determined with the purge and trap method with GC/MSD recommended by the us EPA 542.2 method. Chloroform is the most of THMs (47.43%~93.11%) and the content order is bromodichloromethane > chlorodibromomethane > bromoform. In Incheon, Taejon, Kwangju, Taeku and Pusan, the content of bromodichloromethane, chlorodibromomethane and bromoform was higher than Seoul. But, in June and September, the concentration of THMs in six cities is not over Korea Drinking Water Regulation
. The calculated human exposure for each substances were chloroform
Variable Layer Distance of Intercalates of Dodecanesulfonate in Hydrated Cobalt Compound
Huh, Y.D. ; Jun, T.H. ; Park, Y.J. ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 66~71
The intercalated compound of dodecanesulfonate into hydrated cobalt was synthesized. The compound shows a layered structure as determined by high temperature X-ray diffraction. The layer distance of the product is increased from
by increasing the temperature from
. We can control the layer distance by varying the temperature which is accomplished by changing from the monolayer to the bilayer structure of the intercalated dodecanesulfonate.
Determination of Volatile Organic Compounds in Waste using HS/GC/MS Analysis
Kim, Kyeo-Keun ; Shin, Sun-Kyoung ; Ju, Do-Weon ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 72~80
The HS/GC/MS method was performed to analyze the volatile organic compounds in waste sludge samples. This study was performed to establish the fundamental data by studying the effects of salt, equilibrium temperature and time in the volatile organic compounds analysis. The presence of salts have been found to increase the sensitivity. The peak area is increased from 1.07 to 2.61 times by adding the salts to the water sample, compared with a salt tree sample. The recoveries of target compounds have found between 90% and 127% at sample temperature of
for 30 min. This HS/GC/MS method can be applied to analyze the volatile organic compounds and organohalo compounds in the environmental matrix.
Preconcentration and Speciation of Trace Mercury Compounds in Water Sample Using Dithizonates Extraction and Reverse Phase Liquid Chromatography
Suh, Jung-Ki ; Cho, Kyung-Haeng ; Lee, Sang-Haak ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 81~88
A rapid preconcentration method was developed for the speciation of the trace mercury compounds in water sample. The mercury compounds were extracted and preconcentrated simply as their dithizone complexes by passing through the dithizone impregnated ultra-high molecular weight polyethylene (UHMWPE) membrane solvent inlet filter following sanification in methanol solvent. The concentrated dithizonates were separated by liquid chromatography on a
column. Complete resolution was obtained between methyl-, ethyl-, phenyl-, and inorganic mercury with a mobile phase of 0.05 M acetate buffer (pH=4)/THF/methanol(3:5:2). The separnted mercury chelates were detected by spectrophotometrically at 475 nm. The proposed method was successfully applied to the speciation of mercury compounds in waste water with detection limit at the subnanogram/mL level.
Micropore Analysis and Adsorption Characteristics of Activated Carbon Fibers
Moon, Dong-Cheul ; Lee, Kwang-Ho ; Kim, Chang-Soo ; Kim, Do-Hyung ; Kim, Mi-Ran ; Shin, Chae-Ho ; Park, II-Young ; Nam, Seoung-Youl ; Lee, Chang-Gi ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 89~95
Three grades of activated carbon fibers (ACFs) were prepared from various precursors of plantic, synthetic, and mixed fabrics of viscose rayon and cotton. The ACFs an exhibited type I isotherms on the adsorption of nitrogen or argon. Micropore analysis revealed that the ACFs have uniform micropore size distribution in which their peak diameters were in the range of
. The BET surface area of ACFs up to
was proportional to the adsorption capacity of iodine. The BET values of the ACFs prepared were proportional to the burn-off degree of the products.
Adsorption Properties of Heavy Metal Elements using Zeolite
Shim, Sang-Kwon ; Park, Jin-Tai ; Kim, Tae-Sam ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 96~100
The adsorption of heavy-elements to zeolite has been investigated at various adsorptional condition for purification of waste water. Four heavy elements, Cd, Cr, Cu and Pb, were examined, because they are concerned to the major heavy-element contamination. The adsorption efficiencies are measured at the different conditions such as adsorption times and pHs. The practical adsorption was achived and reaches to maximum within 30 minute by using of 2-g zeolite for 50 mL of heavy-element solution. The overall adsorption efficiencies for Cr and Cu are high and become better at low pH. Cd and Pb have 95% of adsorption ratio and this is lower than other two elements. Cadmium shows an abnormally low adsorption at low pH.
Analysis of Automotive Paints using Pyrolysis-Gas Chromatography
Shon, Sung-Kun ; Park, Ha-Sun ; Lee, Jin-Sook ; Hong, Sung-Wook ; Park, Sung-Woo ; Cho, Sung-Hye ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 101~107
The automotive paints could be generally differentiated by color, layer sequence and chemistry of the paint layers comprising each of the topcoat and the primer system. The successful identification of hit-andrun a and traffic accidental vehicles from evidential paint fiagments is greatly facilitated with a comprehensive laboratory collection of reference paint samples and the technique for direct analysis without sample preparation. The Pyrolysis-Gas Chromatography(PGC) is a precise and reliable method for performing both quantitative and qualitative analysis of polymeric materials and forensic samples. Our Forensic Laboratory is conducting the examination and identification of 73 reference paint samples; 4 colors of each domestic automotive make that is popular in Korea, by Curie Point Pyrolyzer(JHP-3) and GC with capillary column(ultra alloy-5). This method can be used not only to compare paint traces with their suspected sources, but also to identify the type, make and model of the automotive car.
A study on the screening of toxic materials by HPTLC and GC/MS
Park, Sung-Woo ; Jang, Seong-Gil ; Park, You-Sin ; Lee, Jin-Hoon ; Lee, Sang-Ki ; You, Jae-Hoon ; Kim, Dong-Hwan ; Jin, Kwang-Ho ; Kim, Ki-Wook ; Kim, Yu-Na ; Lho, Dong-Seok ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 108~120
To perform an effective screening for toxic materials of forensic interest detected in high profile criminal case in biological and environmental samples, we tried to construct a searchable computerized database using HPTLC(High Performance Thin Layer Chromatography) and GC/MS. Retardation factor(
) values and UV spectral data of HPTLC were investigated for 160 pesticides, 34 chemicals and 39 explosives of standard grade. The data were compiled in a library. We also analyzed 112 pesticides, 31 chemicals and 17 explosives and 57 volatile organic compounds(VOCs) by GC/MS. The data for RT and characteristic mass ions were also compiled in a library.
Comparison of analytical methods of hippuric acid in urine
Lee, Mi-Young ; Yang, Jeong-Sun ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 121~126
The aim of this study is to assess the interference effect of other organic acids to the values of hippuric acid analysed by UV method. We calculated the interference effect of several metabolites of styrene and xylene, i.e., methylhippuric acid, phenylglyoxylic acid, and mandelic acid to hippuric acid, respectively. The result of interlaboratory quality control program of urinary hippuric acid showed that there was no significant difference between the results by UV and HPLC if there were no other organic acids in urine. However, 0.5-2.0 g/L methylhippuric acid showed positive interference of 64-82% to 0.33 g/L urinary hippuric acid while mandelic acid or phenylglyoxylic acid did not show this positive effect. We suggest that HPLC or GC method is more acceptable than UV method to analyse urinary hippuric acid for biological monitoring when the worker was exposed to mixture of toluene and xylene.
Application of Deuterium NMR Analysis for the Differentiation of Korean and Foreign Liquors
Han, Gee-Chung ; Lee, Sueg-Geun ;
Analytical Science and Technology, volume 13, issue 1, 2000, Pages 127~129
NMR analysis was used to determine the relative deuterium contents at the position of methyl and methylene in ethyl alcohols. Four different liquors manufactured in Korea clearly showed different R values from those of foreign liquors. These R values for the Korean liquors could be used to distinguish adulteration.